Why phenolphthalein fails for ammonia with HCl
Titrate the ammonia in 25 mL of dilute NH₃ (10 mmol) with 1 M HCl: phenolphthalein loses its colour early; methyl orange changes at the true end point (10 mL).
About this experiment
| Subject | Chemistry |
|---|---|
| Class | 11 |
| Unit | 11. NEET / JEE Practice Labs (Class XI) |
| Level | NEET level |
| Access | Included in a PractiSci plan |
What you do in the lab
Change the controls and watch the chemistry behave in real time in 3D. Live readouts and graphs show the numbers behind it, and the Learn tab has the theory, procedure, observations and viva questions. Works on a phone or a laptop, in English and Hindi.
Topics: chemistry · NEET / JEE Practice Labs (Class XI)
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